| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.49973 | |||
| Specific gravity | 1.76 | g cm-3 | ||
| Minimum ionization | 1.758 | MeV g-1cm2 | 3.094 | MeV cm-1 |
| Nuclear collision length | 61.7 | g cm-2 | 35.06 | cm |
| Nuclear interaction length | 90.3 | g cm-2 | 51.33 | cm |
| Radiation length | 36.62 | g cm-2 | 20.81 | cm |
| Critical energy | 70.32 | MeV (for e-) | 68.40 | MeV (for e+) |
| Molière radius | 11.04 | g cm-2 | 6.275 | cm |
Plasma energy ![]() |
27.02 | eV | ||
| Muon critical energy | 932. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| 9 | |||
| * calculated from mass fraction data. | |||